Tencel Lyocell is a form of Lyocell fiber that is naturally sourced and machine assembled from the botanic cellulose fiber of hardwood trees. It is a nanofiber, meaning it has a very small diameter. When woven into a fabric, it carries a higher thread count than many other materials. Sensitive sleepers rest soundly on smooth, hypoallergenic and eco-friendly Tencel Lyocell fibers. Promotes a pleasantly dry, yet static-free climate.